1678389457240 has 32 divisors (see below), whose sum is σ = 3779429240880. Its totient is φ = 670813034112.

The previous prime is 1678389457229. The next prime is 1678389457253. The reversal of 1678389457240 is 427549838761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16910802 + ... + 17009761.

It is a 1-persistent number, because it is pandigital, but 2⋅1678389457240 = 3356778914480 is not.

Almost surely, 2^{1678389457240} is an apocalyptic number.

1678389457240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1678389457240 is an abundant number, since it is smaller than the sum of its proper divisors (2101039783640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1678389457240 is a wasteful number, since it uses less digits than its factorization.

1678389457240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33921811 (or 33921807 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

It can be divided in two parts, 167838 and 9457240, that added together give a triangular number (9625078 = T₄₃₈₇).

The spelling of 1678389457240 in words is "one trillion, six hundred seventy-eight billion, three hundred eighty-nine million, four hundred fifty-seven thousand, two hundred forty".